HomeMycology SuppliesGrow Jars “JMF” has been added to your cart. View cart Grow Jars Grain jars are used to cultivate and store beneficial fungi before introducing them to the growing medium. Category: Mycology Supplies Tags: Grow Jars, Mycology Supplies Product ID: 29748 Description Description Grain jars are used to cultivate and store beneficial fungi before introducing them to the growing medium. Related products Grow Kits Read more AEG Revert: Chocolate Gill $25.00 Buy now Slim Shady $25.00 Buy now